Martin = 850 g = &frac12; of Jule's bag. So Jule's bag = 850 × 2 = 1700 g.<br><br>
[[model:questions/solutions/q4639.png]]<br><br>
&bull; Ricky's bag = 5 × Jule's bag = 5 × 1700 = 8500 g<br>
&bull; 8500 g = 8 kg 500 g<br><br>
Ricky's bag is 8 kg 500 g.<br>
Check: Martin 850 g, Jule 1700 g (2× Martin), Ricky 8500 g (5× Jule). ✓